Speaker



FIG. 1 is a front perspective view of a speaker, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof.

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right side view thereof.

The left side view is a mirror image of the right side view as shown in FIG. 7, and thus not shown.

The portions shown in broken lines in FIGS. 1-7 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a speaker, as shown and described. 